My fiance's brother steals from the family?

hello yahoo users My fiance found out on tuesday that his older brother (23) was stealing money from his account. He stole almost two thousand dollars(not all at once) and he wants to put him in jail. There mother who is getting gastric bypass surgery next week pleaded with him not to put his brother in jail. This is not the first time he stole money from his family. He stole from his mother and also made a fake account using his father’s name!! they didn’t do not a dame thing! So now my fiance decided not to put him in jail because of his mom and i’m pissed of because of that i mean come on isn’t that fraud?? he is a criminal this is crazy!